Object.new will ref_sink() the returned instance if it is floating
Object.new will ref_sink() the returned instance if it is floating

Fixes bug 555006.

rvu95/vala,themiwi/vala,kamanashisroy/aroop,xdave/pvala,rvu95/vala,Distrotech/vala,playya/vala,tjol/vala-tjol,flobrosch/vala-fixes,severinh/vala,jessevdk/vala,severinh/vala,frida/vala,frida/vala,flobrosch/vala-fixes,jessevdk/vala,flobrosch/vala-fixes,severinh/vala,rvu95/vala,GNOME/vala,spidermonkdust/vala,spidermonkdust/vala,themiwi/vala,tjol/vala-tjol,Distrotech/vala,Distrotech/vala,kamanashisroy/aroop,frida/vala,GNOME/vala,frida/vala,jessevdk/vala,frida/vala,GNOME/vala,spidermonkdust/vala,playya/vala,GNOME/vala,tjol/vala-tjol,playya/vala,kamanashisroy/aroop,themiwi/vala